You could make a dedicated 16 volt water pump battery and that just might drive it fast enough. Maybe switch it between 12 and 16 volts as it comes up to operating temp.
I don't know if I am going to use an electric water pump on my next engine build because I would like to do an alt delete and it will already have an electric fuel pump sucking down power.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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